Mary e



(No Model.)

6 Sheets sheet 1.

H. 'P. GASKILL, Deod M-. E. GASKILL,EXe0ut1iX. ROTARY DOUBLE PISTONLIQUID METER.

Patentedfeb. 18, 1890.

N. PETERS. Phdvliihugnnhee. Wnhinglon, D, C

2 t e e h S .S t e e h S 6 m 0 .m Dr. m LR E KI Sm AG M H (No Mode-LyROTARY DOUBLE PISTON LIQUID METER.

No. 421.489. Patentedfeb, 18,1890,

INVENT R= Q/KJ WITNESSES- (No Model.) 6 Sheets-Sheet 3.

H. F. GASKILLDe c'd.

M. E. GAsKiLL, Executrix. ROTARY DOUBLE PISTQN LIQUID METER.

No. 421,489. Patented Feb. 18, 1890,

(No Model.) 6 Sheets-Sheet 4.

H. P. GASKILL, Decdt M. E. GASKILL, Exeoutn'x. ROTARY DOUBLE PISTONLIQUID METER.

No. 421,489. Patented Feb. 18, 1890.

"INvENTum (No Model.) 6 Sheets-Sheet 5.

HP. GASKILL, Deod.

M. E. .GASKILL, Executrix. ROTARY DOUBLE PISTON LIQUID METER.

Patentag d Feb. 18,1890.

WITNEZSEEEF |NVENTDR= 8 e h S 6 N 0 e L L l K S A G P H .q d 0 M 0 m M.E. GASKILL, Executrix. ROTARY DOUBLE PISTON LIQUID METER.

Patented Feb.-18, 1890.

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W E. 2 WW WITNEESE5= N. PETERS, Ehalo-Uthogmpher, Waahington, n. r;

UNITED STATES PATENT OFFICE.

HARVEY F. GASKILL, OF LOCKPORT, NE\V YORK;.1\1ARY E. GASKILL EXECUTRIXOF SAID GASKILL, DECEASED.

ROTARY DOUBLE-PISTON LIQUID-METER.

SPECIFICATION forming part of Letters Patent No. 421,489, dated February18, 1890. Application filed SeptemberB, 1888. Serial No.'284,456- (Nomodel.)

tional elevation 011 lineAB of Fig. 3 at right angles to Fig. 1. V Fig.3 is a horizontal section on line E F of Fig. 2, but with cover removed.Fig. 4 is a plan of'the base-piece. Fig. 5 is a plan of the lowercylinder. Fig. 6 is a central sectional elevation of the lower cylinder.Fig. 7 is a plan of the plate which separates thetwo cylinders. Fig. 8is a side view of said plate. Fig. 9 is a plan of the rotating piston.Fig. 10 is a central sectional elevation of the piston. Fig. 11 is aplan of the upper cylinder. Fig. 12 is a central sectional elevation ofthe upper cylinder.

The meter shown in the drawings consists, in its main parts, of a base,two cylinders, one above the other, mounted on the base and havingWater-passages in their peripheral sides, a rotating piston in eachcylinder, a separatingplate between the cylinders, provided with cut-01fflanges projecting into the cylinders to separate the inlet from theoutlet, a cover-plate for the upper cylinder, a surrounding casing, andgearing and counting or registering mechanism.

The base-casting A (shown in plan in Fig. 4 and in section in Figs. 1and 2) is provided with nozzles 00, which may be threaded, as shown, formaking connections. One of these 00 contains the inlet-opening andtheother a the outlet. The body of the casting is hollow, as shown, and theinlet, which occupies the center and one side of the interior chamber,is divided by a web or membrane B fromthe outlet.

O is the lower cylinder. It is circular in form With a circular interiorchamber D. Water enters this chamber at c and leaves it through thepassage {1 and opening 70, Fig. 5. The upper cylinder F is of similarconstruction, with a chamber G, an inlet d, and outlet h 7e, Fig. 11.

The pistons H are preferably of the form shown in Figs. 9 and 10, withopenings at, and may be made of rubber or other suitable material. Theyare somewhat smaller in diameter than the chambers D and G, and arearranged in the chambers so as to be in contact with their walls at oneside.

c is a shaft stepped at its lower end in th basecasting and extending upcentrally through the chamber D and G. Upon that part of shaft 0 whichis within the chambers a hollow shaft 1) iseccentrically secured, andupon this shaft 19 the pistons H are mounted. As a result of thisarrangement the pistons, when in place, are concentric'with shaft b,

but eccentric to c and to the chambers, and

are in contact with the walls of the chambers at one side, and as thepistons sweep around in the chambers they will revolve upon shaft 1) androll upon the walls of the chambers like wheels, thereby greatlyreducing friction. The inlet and outletsides of the chambers are dividedby T-shaped pieces 6 and f, one in each chamber, which extend from topto bottom oftheir respective chambers and have their heads against theirrespective pistons and their webs arranged to slide, like sliding doors,into spaces a and b in the dividingwalls which separate theinletpassages c and d from the outlet-passages g and it. These pieces 6and f are both connected to a plate (Z at opposite sides and on oppositesur.

faces thereof, and the plate is arranged between the two cylinders, soas to separate the chambers D and G from each other. As the pistons I-Itravel around, the pieces a and f move in and out in unison and theplate at slides with them. I

'L is a covering-plate on the top of cylinder F.

1 are bolts or screws which fasten the two cylinders to the base A.

p is a pinion onthe upper end of shaft 0.

s is a gear whose arbor 'is supported in a bridge n.

q is a gear meshing with pinion 1), and r is a pinion on the same arborgear qand meshing with gear 3. The object of this arrangement is toreduce the speed between shaft 0 and the counter mechanism.

m is the casing of the meter, secured to base A and inclosing thecylinders, &c.

u is a shaft mounted ina bearing in casing m and passing through astuffing-box to prevent leakage.

At t shaft u is coupled to the arbor of gear 8. WVhen it is desiredtoopen the meter, the coupling t parts, and the casing may be liftedwithout disturbing the gearing.

At w are lugs on casing m, for the support and attachment of thecounting mechanism which is coupled to shaft u. I have not thought itnecessary to show this mechanism, as its construction forms no part ofmy present invention.

In operation the Water or other liquid to be measured enters at w, and,following the course indicated by the arrows, passes up through openingsZ Z, around the cylinders, and up through the central opening, throughshaft 1), and through the pistons at a, and fills casing m. Thence itpasses through d into chamber G, and, turning the piston therein, passesout at it, down through It, and out at :10. It also passes through 0into chamber D, and, turning the piston therein, passes out through 9and down through 70' and out at 00. Each piston is carried past itsdead-point by the other piston, which at that moment will be atmid-stroke.

What I claim is- 1. The combination, substantially as set forth, of thetwo cylinders (J and F, the pistons moving therein, the slidingseparatingplate d, and abutment-pieces e and f.

2. A liquid-meter having two circular measuring-chambers having a commonaxis, cylindrical pistons revolving therein, an abutment, for eachpiston, and a sliding plate separating the pistons and moving theabutments,

the said pistons being always at opposite points of their strokes,substantially as set forth.

3. In combination with the casing provided with suitable inlets andoutlets, two superimposed cylinders O and F, axially in line with eachother, having openings 0 d in their walls communicating with theinterior of the casing, and with openings 70 and k, commu rotatablepistons, and valves.

5. In combination with a suitable casing,

stationary superimposed hollow-walled cylinders provided with inlet anddischarge openings, rotating pistons mounted eccentrically within thecylinders and arranged diametrically opposite each other, and movableabutments againstwhich the pistons act.

6. In combination. with a suitable casing, superimposed hollow-walledcylindersprovided with inlet and discharge openings, rotating pistonsmounted eccentrically within the cylinders diametrically opposite eachother, and provided with openings, a hollow shaft by which said pistonsare carried, and a plate d, cut away at its middle and provided withabutments. v

HARVEY F. GASKILL.

'Witnesses:

F. H. SEYMOUR, W. T. SEARS.

